1. How do you divide 1.6 ÷ 0.2?

2. In this lesson you will learn how to divide decimals by using a number line.

3. Let’s Review Number lines can show both whole numbers and fractions. 012

4. A Common Mistake Forgetting to take the decimal into consideration when dividing. 12 ÷ 0.6 ≠ 2

5. Let’s Review Core Lesson Smart Estimate 1.6 ÷ 0.2 1.6 ÷ 0.2 = 8 There are 5 sets of 0.2 in each whole and 3 sets of 0.2 in 6 tenths Smart estimate: 8

6. Let’s Review Core Lesson This is a reasonable answer since it matches my smart estimate 1.6 ÷ 0.2 = 8 l l l l l l l l l l l l l l l l l l l l l 0 2 1 1.6 12 3 4 56 78

7. Let’s Review Core Lesson Susie wants to walk to school which is 2.3 miles away. She wants to walk 0.5 of a mile and then take a break. How many breaks will she take? 2.3 ÷ 0.5 ≈ 2.3 is close to 2 Smart estimate: 4 There are 2 sets of 0.5 in each whole 2 ÷ 0.5 ≈ 4

8. Let’s Review Core Lesson This is a reasonable answer since it is close to my smart estimate 2.3 ÷ 0.5 = 4 breaks Then she will walk 3 tenths more 2.3 l l l l l l l l l l l l l l l 0 32 1 1 break 2 breaks 3 breaks 4 breaks 3 tenths more

9. In this lesson you have learned how to divide decimals by using a number line.

10. Let’s Review Guided Practice 2.5 ÷ 0.25 0123

11. Let’s Review Extension Activities Fred buys 1.10 pounds of apples for a total price of $3.30. Use a number line to show how much he paid per pound.

12. Let’s Review Extension Activities Explain why the quotient can be a whole number when we are dividing a decimal by a decimal.

13. Let’s Review Quick Quiz Which number line shows 0.8 divided by 0.2?.8 1 2 3 4 l l l l l l l l l l l 0 1.8 1 2 0 1.8.8 0 1 A B C